Backlight device and display device

Abstract

The invention provides a backlight device and a display device.The backlight device comprises a supporting assembly and a plurality of light bars, the supporting assembly comprises two side edge structural parts which extend in the first direction and are oppositely arranged, and two supporting parts which extend in the second direction and are oppositely arranged; the two ends of the supporting piece are detachably connected with the two ends of the side edge structural piece to form a frame body. The supporting pieces are provided with a plurality of first clamping openings in the second direction, and the positions of the first clamping openings in the two oppositely-arranged supporting pieces correspond to each other in the first direction. The first direction intersects with the second direction, and the ends of the light bar are clamped into the first clamping openings of the two oppositely-arranged supporting pieces respectively. The backlight device is easy to assemble and high in efficiency.

Description

Technical Field

[0001] The present invention relates to the field of display technologies, and particularly to a backlight device and a display device. Background Art

[0002] With the continuous progress of liquid crystal display (LCD) panel technologies, the manufacturing process of glass-based light bars has become increasingly mature, but currently it is mainly limited to the application of a single light bar. With the increase in the number of lamp beads on a single light bar, the manufacturing difficulty also rises accordingly. Especially in the field of direct-lit lamp boards of large-size, multi-arrangement mini light-emitting diodes (MiniLEDs), successful development cases are relatively rare.

[0003] In view of this, a glass-based light board is proposed by splicing multiple glass-based light bars. However, when the glass-based light board formed by splicing multiple glass-based light bars is applied in a backlight device, there are problems such as low assembly efficiency. Summary of the Invention

[0004] The present invention mainly provides a backlight device and a display device, and the backlight device is simple to assemble and has high efficiency.

[0005] To solve the above technical problems, the first technical solution adopted by the present invention is: to provide a backlight device, including: A support assembly, including two side structure members extending along a first direction and arranged oppositely, and two support members extending along a second direction and arranged oppositely; both ends of the support member are detachably connected to both ends of the side structure member to form a frame; the support member is respectively provided with a plurality of first card interfaces along the second direction, and the first card interfaces on the two oppositely arranged support members correspond to each other in the first direction; the first direction intersects with the second direction; A plurality of light bars; the end portions of the light bars are respectively snapped into the first card interfaces of the two oppositely arranged support members.

[0006] In one embodiment, the side structure member includes a side structure member body along the first direction and first card-connecting portions arranged at both ends of the side structure member body, and a first through hole penetrating through the first card-connecting portion is arranged on the first card-connecting portion; The support member is provided with second card interfaces along the second direction and corresponding to the positions of the first card-connecting portions, and second through holes are arranged at positions corresponding to the first through holes of the second card interfaces. The first card-connecting portion is snapped into the second card interface, and the first through hole communicates with the second through hole; The backlight device further includes: a first fixing member, and the first fixing member penetrates through the first through hole and the second through hole to fix the side structure member and the support member.

[0007] In one embodiment, the backlight device further includes: A reflective sheet; a first stopper is provided on the first side surface of the support member, a first positioning portion is provided at a position of the reflective sheet corresponding to the first stopper, and the first positioning portion cooperates with the first stopper and is used to fix the reflective sheet; The reflective sheet is further provided with a plurality of windows, the windows corresponding to the lamp beads on the light bar one by one, and the lamp beads are exposed from the windows.

[0008] In one embodiment, the backlight device further includes: A pressing member; the pressing member is located at a side of the reflector away from the support member and is arranged corresponding to the support member; a third card interface is arranged at both ends of a side of the pressing member close to the support member at positions corresponding to the side structure member, the first card connection portion of the side structure member is engaged with the third card interface, the pressing member is further provided with a third through hole, and a fourth through hole is arranged at a position of the support member corresponding to the third through hole; a second fixing member, the second fixing member passing through the third through hole and the fourth through hole to fix the pressing member; A plurality of optical films are arranged on a side of the reflector away from the light strip, and second limiting members are arranged at both ends of the side of the clamping member away from the reflector. A second positioning portion is arranged at a position of the optical film corresponding to the second limiting member and cooperates with the second limiting member to fix the optical film.

[0009] In one embodiment, the first card interface includes a plurality of first grooves disposed on the first sides of the two supporting members, the first grooves having a bottom wall, two opposite side walls, and a rear wall connecting the two side walls; the ends of the plurality of light strips are carded into the first grooves, the bottom wall supports the ends of the light strips, the rear wall abuts against the ends of the light strips, and the two side walls are in contact with the side surfaces of the ends of the light strips; The first limiting member on the support member is arranged at a position staggered from the first groove; the reflective sheet comprises a reflective sheet body and a lug connected to the reflective sheet body, the lug is arranged at a position corresponding to the first limiting member, and the cross section of the lug is larger than the cross section of the first limiting member, and the first positioning portion is arranged at a position of the lug corresponding to the first limiting member; the outer edge of the reflective sheet is aligned with the inner edge of the frame; A second groove is arranged on one side of the pressing member close to the supporting member at a position corresponding to the first groove, and a buffer pad is arranged in the second groove.

[0010] In one embodiment, the support member includes a first support member and a second support member. The first card interface includes a third groove with an opening on the second side of the first support member and a fourth groove with an opening on the third side of the second support member. The second side of the first support member and the third side of the second support member are opposite to each other. Wherein, the third groove includes: a sub-groove and a sub-through hole that communicate with each other. The third groove penetrates from the second side of the first support member to the third side of the first support member. The caliber of the sub-groove is larger than that of the sub-through hole. One end of the light bar is inserted into the fourth groove, and the other end is inserted into the sub-groove. The sub-through hole is used to arrange a signal line connecting the light bar. The backlight device further includes: a plurality of optical films. The optical films are arranged on the side of the reflective sheet away from the light bar. A third limiting member is arranged on the first side surface of the first support member and the second support member. The optical films are provided with third positioning portions corresponding to the positions of the third limiting members to cooperate with the third limiting members to fix the optical films.

[0011] In one embodiment, the backlight device further includes: An outer frame. The outer frame includes a top wall and an annular side wall connected to the top wall. A hollow portion is formed on the top wall. The annular side wall is disposed around the outer periphery of the frame body, and a fourth card interface is provided at a position corresponding to the support member, and a fifth card interface is provided at a position corresponding to the side structure member. A second card joint portion is provided on the outer wall of the support member at a position corresponding to the fourth card interface, and a third card joint portion is provided on the outer wall of the side structure member at a position corresponding to the fifth card interface. The outer frame covers the light bar, and the second card joint portion is engaged into the fourth card interface, and the third card joint portion is engaged into the fifth card interface. Wherein, an avoidance groove for leading out a signal line is further provided at a position of the annular side wall corresponding to the first card interface.

[0012] In one embodiment, the support member is straight or curved.

[0013] In one embodiment, the backlight device further includes: A heat dissipation layer. The heat dissipation layer is arranged on the side of the reflective sheet close to the light bar, or on the side of the light bar close to the reflective sheet.

[0014] To solve the above technical problems, the first technical solution adopted by the present invention is: to provide a display device, the display device includes a backlight device and a display panel, the display panel is arranged on the light-emitting side of the backlight device, and the backlight device is the backlight device described in any one of the above.

[0015] The beneficial effects of the present invention are as follows: Different from the prior art, the backlight device provided by the present invention includes a support assembly and a plurality of light bars. The support assembly includes two side structure members extending in a first direction and arranged oppositely, and two support members extending in a second direction and arranged oppositely. Both ends of the support member are detachably connected to both ends of the side structure member to form a frame. A plurality of first card interfaces are respectively arranged on the support member along the second direction, and the first card interfaces on the two oppositely arranged support members correspond to each other in the first direction. The first direction intersects with the second direction, and the end portions of the light bars are respectively snapped into the first card interfaces of the two oppositely arranged support members. The backlight device of the present application is simple to assemble and has high efficiency. Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 is a schematic structural diagram of the first embodiment of the backlight device provided by the present application; Figure 2 is Figure 1 an exploded view of the backlight device shown; Figure 3 is a schematic structural diagram of the first embodiment of the support member of the present application; Figure 4a is a schematic structural diagram of the second embodiment of the support member of the present application; Figure 4b is Figure 4a a cross-sectional view taken along the A-A direction at position M; Figure 5 is a schematic structural diagram of the side structure member of the present application; Figure 6 is a schematic structural diagram of the first embodiment of the reflector of the present application; Figure 7 is a schematic structural diagram of the second embodiment of the reflector of the present application; Figure 8a is a schematic structural diagram of the front side of the pressing member of the present application; Figure 8b is a schematic structural diagram of the back side of the pressing member of the present application; Figure 9 is a schematic structural diagram of the third embodiment of the support member of the present application; Figure 10a is a schematic structural diagram of the assembled structure of the side structure member and the support member in the backlight device provided by the present application; Figure 10b It is a schematic assembly structure diagram of a light bar in the backlight device provided by this application; Figure 10c It is a schematic assembly structure diagram of a reflective sheet in the backlight device provided by this application; Figure 10d It is a schematic assembly structure diagram of a pressing member in the backlight device provided by this application; Figure 10e It is a schematic assembly structure diagram of an optical film in the backlight device provided by this application; Figure 11 It is a schematic structure diagram of an embodiment of the display device of this application.

[0018] Explanation of reference numerals: Backlight device 10, support assembly 1, light bar 11, support member 12, first card interface 20, side structure member 13, side structure member body 133, first card connection portion 131, first through hole 132, second card interface 24, second through hole 25, first fixing member 18, reflective sheet 14, first limiting member 22, first positioning portion 142, window 143, pressing member 15, third card interface 151, third through hole 154, fourth through hole 26, second fixing member 19, first groove 21, reflective sheet body 144, lug 141, second groove 152, buffer pad 155, first support member 121, second support member 122, third groove 1212, sub-groove 1212c, sub-through hole 1212d, optical film 16, second limiting member 153, second positioning portion 161, outer frame 17, top wall 174, annular side wall 176, hollow portion 175, fourth card interface 173, fifth card interface 172, second card connection portion 23, third card connection portion 134, avoidance groove 171, signal line 30, display device 100, display panel 200. Detailed implementation manners

[0019] The following will describe the solutions of the embodiments of this application in detail with reference to the accompanying drawings of the specification.

[0020] In the following description, specific details such as specific system structures, interfaces, and technologies are presented for the purpose of illustration rather than limitation, so as to thoroughly understand this application.

[0021] The term "and / or" in this article is merely a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this article generally represents an "or" relationship between the associated objects before and after. In addition, "multiple" in this article means two or more than two.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terms used herein are for the purpose of describing embodiments of this application only and are not intended to limit this application.

[0023] Before further elaborating on the embodiments of this application, the nouns and terms involved in the embodiments of this application are described, and the nouns and terms involved in the embodiments of this application are applicable to the following explanations.

[0024] A backlight device is a device that provides a backlight for a liquid crystal display (LCD), etc. Specifically, the liquid crystal itself does not emit light and requires a backlight source to provide uniform light so that the liquid crystal display can display clear images and text. Therefore, the backlight device is used to provide a uniform light source. By controlling parameters such as the brightness and color of the backlight source, the contrast, color saturation, and brightness uniformity of the liquid crystal display can be improved, thereby improving the display effect. Therefore, the backlight device can enhance the display effect.

[0025] The general components of existing backlight devices typically include: a light source, a light guide plate, a reflective sheet, a diffusion sheet, and a brightness enhancement film. Common light sources include cold cathode fluorescent lamps (CCFLs) and light-emitting diodes (LEDs). CCFLs have high brightness and good color performance, but have the disadvantages of high power consumption, large volume, and containing harmful substances such as mercury. LEDs, on the other hand, have the advantages of low power consumption, long lifespan, fast response speed, small size, and no mercury, etc., and thus have been widely used. In particular, new LED technologies such as Mini LED and Micro LED have further improved the performance of backlight devices. The function of the light guide plate is to evenly guide the light emitted by the light source to the entire display area. It is usually made of optical-grade plastic or glass materials and the surface is specially treated, such as etching, printing, etc., to achieve efficient light propagation and uniform distribution. The reflective sheet is located below the light source and is used to reflect the downward light emitted by the light source back to the light guide plate, improving the utilization rate of light and reducing light loss. Materials with high reflectivity, such as aluminum foil and reflective film, are generally used. The diffusion sheet is mainly used to diffuse the light output by the light guide plate, making the light more evenly distributed in the entire display area and reducing the phenomenon of uneven brightness and darkness. It can achieve this purpose by scattering light and is usually made of an optical-grade plastic film with a micro-convex structure on the surface or added with a diffusing agent. The brightness enhancement film, also known as a prism sheet, functions to improve the light extraction efficiency of the backlight device and increase the brightness of the display. It gathers the light and emits it towards the front, reducing the scattering of light on the side, thereby improving the utilization rate of light and making the display look brighter.

[0026] Existing backlight devices are generally divided into direct - type backlights and edge - lit backlights. In a direct - type backlight, the LED light source is directly placed below the liquid crystal panel, and through optical elements such as a light guide plate and a diffusion sheet, the light is evenly distributed across the entire panel. This backlight method can achieve high brightness and contrast, and can also achieve local dimming, improving the layering and detail performance of the picture. In an edge - lit backlight, the LED light source is placed on the side of the liquid crystal panel, and the light is guided to the front of the panel through a light guide plate. The advantage of this backlight method is that it can achieve a thinner appearance design, which is suitable for thin and light monitors and TVs.

[0027] The backlight device provided in this application is a direct - type backlight. To enable those skilled in the art to better understand the technical solution of the present invention, the following further describes in detail a chip transfer device provided by the present invention in conjunction with the accompanying drawings and specific embodiments.

[0028] See Figure 1 , Figure 1 FIG. is a schematic structural diagram of the first embodiment of the backlight device provided in this application. The light source of the backlight device 10 of this application is set to be composed of a plurality of lamp strips assembled together. The lamp strips can be prepared from scrap materials, for example, and then several lamp strips are spliced to form a lamp board. This can not only increase the material utilization rate and improve production capacity, but also when a lamp bead on a certain lamp strip is damaged, only the corresponding lamp strip needs to be replaced, without replacing the entire lamp board, reducing costs. Specifically, the lamp strip can be a glass - based lamp strip, for example. A glass - based lamp strip is a lamp strip with a glass as the substrate, usually including a glass substrate, a conductive circuit layer, and a light - emitting element. The conductive circuit layer is composed of a conductive layer provided on the glass substrate and an insulating layer covering the conductive layer. The conductive layer extends to one end of the glass substrate, and part of it is exposed to form a driving electrode. The light - emitting element is provided on the insulating layer and is electrically connected to the conductive layer. By connecting the driving electrode to an external power supply, current is transmitted through the conductive circuit layer to the light - emitting element, causing the light - emitting element to emit light. The glass substrate plays a role in support and insulation, and at the same time, the high light transmittance of the glass helps the propagation of light.

[0029] Specifically, in combination with Figure 2 , Figure 2 is Figure 1 The exploded view of the backlight device shown. The backlight device 10 of this application includes a support assembly 1. The support assembly 1 includes two side - structure members 13 extending in the first direction (such as the x - direction in Figure 2 ) and arranged oppositely, and extending in the second direction (such as Figure 2Two support members 12 extending in the y direction (in the middle) and oppositely arranged; both ends of the support member 12 are detachably connected to both ends of the side structure member 13 to form a frame. Among them, the support member 12 is a strip-shaped structure formed integrally. The support member 12 is respectively provided with a plurality of first card interfaces 20 along the second direction, and the first card interfaces 20 on the two oppositely arranged support members 12 correspond in position in the first direction; the first direction intersects with the second direction.

[0030] The backlight device 10 further includes a plurality of light bars 11. The plurality of light bars 11 extend in the first direction, and the plurality of light bars 11 are arranged in parallel along the second direction. Specifically, the long edges of the plurality of light bars 11 extend in the x direction, and the plurality of light bars 11 are arranged in parallel in the y direction to form a light board by splicing. The end portions of the light bars 11 are respectively snapped into the first card interfaces 20 of the two oppositely arranged support members 12, so as to fix the plurality of light bars 11 to the support assembly 1. In one embodiment, the x direction is perpendicular to the y direction. In another embodiment, the x direction is not perpendicular to the y direction. For example, the included angle between the x direction and the y direction is 30°, 45°, 60°, etc., and no specific limitation is made. For example, 1 row or 2 rows of lamp beads can be arranged on one light bar 11, and no specific limitation is made. In this application, the case where 1 row of lamp beads is arranged on one light bar 11 is taken as an example for illustration.

[0031] Further, in combination with Figure 5 , Figure 5 is a schematic structural diagram of the side structure member of the present application. The side structure member 13 is connected to both ends of the support member 12, used to ensure the distance between the two support members 12, form a frame with the support member 12, and provide the overall frame structure strength. The side structure member 13 includes a side structure member body 133 along the first direction and first clamping portions 131 arranged at both ends of the side structure member body 133. The first clamping portions 131 are provided with first through holes 132 penetrating through the first clamping portions 131; the support member 12 is provided with second card interfaces 24 along the second direction y and corresponding to the positions of the first clamping portions 131, and second through holes 25 are arranged at the positions corresponding to the first through holes 132 of the second card interfaces 24. The two side structure members 13 are respectively arranged on both sides of the plurality of light bars 11, and the first clamping portions 131 are clamped into the second card interfaces 24, and the first through holes 132 are communicated with the second through holes 25.

[0032] In one embodiment, the second card interface 24 can be Figure 3The groove formed on the first side of the support member 12 penetrates from the second side to the third side of the support member 12. Specifically, the groove has a bottom wall and side walls disposed on opposite sides of the bottom wall, so that the first engaging portion 131 of the side structural member 13 can be inserted into the groove. The second engaging opening 24 is arranged in this way to facilitate the installation of the side structural member 13 and the support member 12.

[0033] The backlight device 10 of the present application further includes a first fixing member 18. The first fixing member 18 passes through the first through hole 132 and the second through hole 25 to fix the side structural member 13 and the support member 12. Among them, the first through hole 132 and the second through hole 25 can be, for example, threaded holes, and the first fixing member 18 is a screw or a bolt, etc. It should be noted that the sizes of the first engaging portion 131 and the second engaging opening 24 can be reasonably set. After the first engaging portion 131 is engaged with the second engaging opening 24, the surfaces of the side structural member 13 and the support member 12 are flush.

[0034] In an embodiment, the first engaging opening 20 on the support member 12 for engaging the light bar 11 may include a groove formed on the surface of the support member 12. Specifically, in combination with Figure 3 , Figure 3 is a schematic structural diagram of the first embodiment of the support member 12 of the present application. The first engaging opening 20 includes a plurality of first grooves 21 formed on the surface of the first side of the two support members 12 (the first side is defined as the side of the support member 12 facing the reflector). The first grooves 21 have a bottom wall 213, two opposite side walls 212, and a rear wall 211 connecting the two side walls 212. The ends of the plurality of light bars 11 are engaged with the first grooves 21. The bottom wall 213 bears the ends of the light bars 11, the rear wall 211 abuts against the ends of the light bars 11, and the two side walls 212 are in contact with the sides of the ends of the light bars 11. With such a setting, the light bars 11 can be ensured to be stable in the first grooves 21 and avoid shaking. Of course, in other embodiments, the size of the first groove 21 can be slightly larger than the size of the end of the light bar 11. At this time, a buffer pad can be provided in the first groove 21 to separate the light bar 11 from the first groove 21 to avoid rigid contact. It can be understood that after the buffer pad is provided, the remaining space in the first groove 21 can just accommodate the ends of the light bars 11 to avoid shaking of the light bars and so on.

[0035] It can be understood that the depth of the first groove 21 is the same as the thickness of the end of the light bar 11, so that when the light bar 11 is engaged with the first groove 21, the surface of the light bar 11 can be flush with the surface of the support member 12.

[0036] Furthermore, in combination with Figure 4a and Figure 4b , Figure 4aIt is a schematic structural diagram of the second embodiment of the support member of the present application; Figure 4b is Figure 4a A cross-sectional view taken along the A-A direction at position M in. The two support members 12 respectively include a first support member 121 and a second support member 122, and the first support member 121 and the second support member 122 are respectively arranged at opposite ends of the light bar 11. In another embodiment, the first card interface 20 for clamping the light bar 11 on the support member 12 may include a third groove 1212 with an opening on the second side (a surface perpendicular to the first side surface) of the first support member 121, and a fourth groove with an opening on the third side (a surface perpendicular to the first side surface) of the second support member 122, and the second side of the first support member 121 and the third side of the second support member 122 are opposite.

[0037] Among them, the third groove 1212 includes: a sub-groove 1212c and a sub-through hole 1212d that communicate with each other. The third groove 1212 penetrates from the second side of the first support member 121 to the third side of the first support member 121. The diameter of the sub-groove 1212c is larger than the diameter of the sub-through hole 1212d. One end of the light bar 11 is inserted into the fourth groove, and the other end is inserted into the sub-groove 1212c. The sub-through hole 1212d is used to arrange a signal line 30 connecting the light bar 11.

[0038] In one embodiment, the structure of the fourth groove on the second support member 122 may be the same as the structure of the third groove 1212. However, since there is no need to lead out a signal line in the fourth groove, in another embodiment, the structure of the fourth groove may be different from the third groove 1212. Specifically, the fourth groove may be set to the structure of the sub-groove 1212c, and the sub-groove 1212c does not penetrate the second support member 122.

[0039] One end of the light bar 11 is inserted into the fourth groove and abuts against the bottom of the fourth groove, and the other end is inserted into the sub-groove 1212c and abuts against the connection part of the sub-groove 1212c and the sub-through hole 1212d. The sub-through hole 1212d is used to arrange a signal line 30 connecting the light bar 11 to lead out the signal line 30.

[0040] In another embodiment, the second card interface 24 may also be as Figure 4b the structure in the third groove 1212 in, and it is subject to being able to fix the side structure member 13 and the support member 12, and no specific limitation is made.

[0041] Furthermore, as Figure 2 shown, the backlight device 10 of the present application further includes a reflective sheet 14. Combining Figure 3 and Figure 6 ( Figure 62 is a schematic diagram of the structure of the first embodiment of the reflective sheet of the present application), a first stopper 22 is provided on the first side surface of the support member 12, and a first positioning portion 142 is provided at a position of the reflective sheet 14 corresponding to the first stopper 22, and the first positioning portion 142 cooperates with the first stopper 22 and is used to fix the reflective sheet. Specifically, the reflective sheet 14 is provided on the first side of the support member 12, and the first stopper 22 cooperates with the first positioning portion 142 to fix the reflective sheet 14.

[0042] In one embodiment, the first limiting member 22 includes, for example, a protrusion disposed on the first side surface of the support member 12 , and the first positioning portion 142 includes, for example, a through hole, and the protrusion passes through the through hole, thereby fixing the reflector 14 to the first side of the support member 12 .

[0043] Furthermore, the reflective sheet 14 is also provided with a plurality of windows 143, and the windows 143 correspond to the lamp beads on the light bar 11 one by one, and the lamp beads are exposed through the windows 143. In a specific embodiment, the size of the windows 143 matches the size of the lamp beads, and when the reflective sheet 14 is set on the light bar 11, the lamp beads protrude from the windows 143, so that the reflective sheet 14 can reflect as many received light rays as possible, thereby improving the light utilization rate.

[0044] It should be noted that if the reflector 14 and Figure 3 When the support member 12 shown is used in conjunction with Figure 3 It is a structural schematic diagram of the first embodiment of the support member of the present application, the first limiting member 22 on the supporting member 12 needs to be staggered from the position of the first groove 21, and the reflecting sheet 14 includes a reflecting sheet body 144 and a lug 141 connected to the reflecting sheet body 144, the lug 141 is arranged at a position corresponding to the first limiting member 22, and the cross-section of the lug 141 is larger than the cross-section of the first limiting member 22, and the first positioning portion 142 is arranged at a position where the lug 141 corresponds to the first limiting member 22; the outer edge of the reflecting sheet 14 is aligned with the inner edge of the frame (composed of the supporting member 12 and the side structural member 13).

[0045] because Figure 3 The middle support member 12 is provided with a first groove 21, in which a signal line 30 needs to be arranged, and the lug 141 is provided so that the reflector 14 can avoid the signal line 30. It can be understood that if another support member, such as the second support member 122, does not need to be provided with a signal line 30, then the lug 141 may not be provided on the side of the reflector 14 corresponding to the second support member 122, and only the first positioning portion 142 may be provided.

[0046] In one embodiment, the first positioning portion 142 may be, for example, a through hole, and the first limiting member 22 may be, for example, a protrusion, which passes through the through hole to fix the reflective sheet 14 .

[0047] Further, the backlight device further includes a heat dissipation layer (not shown in the figure), and the heat dissipation layer is disposed on one side of the reflective sheet 14 close to the light bar 11 or on one side of the light bar 11 close to the reflective sheet 14. The heat dissipation layer may be a coated heat dissipation tape. The provision of the heat dissipation layer can ensure that the reflective sheet 14 fits the surface of the light bar, avoiding the warping or falling off of the reflective sheet 14; it can also improve the heat dissipation efficiency, thereby enhancing the reliability of the backlight device.

[0048] In another embodiment, when the reflective sheet 14 is used in cooperation with Figure 4a the shown support member 12, the structures of the support member 12 and the reflective sheet 14 are as Figure 7 shown. Figure 7 FIG. is a schematic structural view of the second embodiment of the reflective sheet of the present application. Since the first card interface 20 is provided on the side wall of the support member 12 and the signal line 30 is also led out from the sub-through hole 1212d on the side wall of the support member 12, there is no need to provide a lug to avoid the signal line 30. Therefore, the reflective sheet 14 is a rectangular structure, and a first positioning portion 142 is provided at a position corresponding to the first limiting member 22. In this embodiment, the outer edge of the reflective sheet 14 is aligned with the outer edge of the frame.

[0049] Further, as Figure 2 shown, the backlight device 10 further includes a pressing member 15 and a second fixing member 19. Combining Figure 8a and Figure 8b , Figure 8a is a schematic structural view of the front side of the pressing member of the present application; Figure 8b is a schematic structural view of the back side of the pressing member of the present application. The pressing member 15 is located on a side of the reflective sheet 14 away from the support member 12 and is provided corresponding to the support member 12; at both ends of the side of the pressing member 15 close to the support member 12, third card interfaces 151 are provided at positions corresponding to the side structure members 13, and the first card connecting portions 131 of the side structure members 13 are snapped into the third card interfaces 151. The pressing member 15 is further provided with a third through hole 154, and the support member 12 is provided with a fourth through hole 26 at a position corresponding to the third through hole 154. The first card connecting portions 131 of the side structure members 13 are snapped into the third card interfaces 151 to fix the pressing member 15.

[0050] It can be understood that the thickness of the first card connecting portion 131 of the side structure member 13 is greater than the depth of the second card interface 24 of the support member 12. Thus, when it is snapped into the second card interface 24 of the support member 12, a part protrudes. At this time, the protruding part is snapped into the third card interface 151, which can further fix the side structure member 13.

[0051] Furthermore, a third through-hole 154 is provided on the pressing member 15. A fourth through-hole 26 is provided on the support member 12 corresponding to the position of the third through-hole 154. A second fixing member 19 passes through the third through-hole 154 and the fourth through-hole 26 to fix the pressing member 15. The third through-hole 154 and the fourth through-hole 26 can be, for example, threaded holes, and the second fixing member 19 can be, for example, a screw or a bolt.

[0052] The pressing member 15 is used for positioning the optical film 16 on one hand and fixing the light bar 11 on the other hand. When the support member 12 is as Figure 3 shown, since the light bar 11 is arranged in the first groove 21 and one side of the first groove 21 close to the reflector 14 is open, the light bar 11 is unstable and will squeeze the reflector 14. Therefore, the pressing member 15 is provided to press it tightly.

[0053] In addition, the pressing member 15 is arranged corresponding to the support member 12. The first support member 121 needs to lead out a signal line from the first groove 21. Therefore, a second groove 152 is provided at a position corresponding to the first groove 21 on the side of the pressing member 15 close to the support member 12. In order to protect the light bar 11, a buffer pad 155 is further provided in the second groove 152. The pressing member 15 is fixed on the support member 12. The second groove 152 corresponds to the first groove 21, and the buffer pad 155 is used to protect the light bar 11. It should be noted that the thickness of the buffer pad 155 is greater than or equal to the depth of the second groove 152. In order to protect the light bar 11, the buffer pad 155 is made of materials such as rubber / silicone / PU, etc., which can provide buffering and avoid rigid contact between the light bar 11 and the pressing member 15, resulting in rupture / damage, etc. The material of the pressing member 15 can be selected from metal materials such as electro-galvanized steel SECC, hot-galvanized steel SGCC, stainless steel or aluminum alloy, or plastic materials such as acrylonitrile-butadiene-styrene copolymer (ABS), polycarbonate (PC), polypropylene (PP), etc.

[0054] It can be understood that the structure of the second groove 152 can be the same as the structure of the first groove 21, or the structure of the second groove 152 can be the same as the structure of the third groove 1212, as long as the signal line 30 can be avoided, and no specific limitation is made. The pressing member 15 corresponding to the second support member 122 does not need to avoid the signal line. Therefore, the pressing member 15 corresponding to the second support member 122 may not be provided with the second groove 152 at the position corresponding to the light bar 11, and only a buffer pad is provided at the position corresponding to the light bar 11 to provide a buffering effect.

[0055] As Figure 2As shown, the backlight device 10 further includes a plurality of optical films 16 disposed on a side of the reflector 14 away from the light bar 11. At both ends of a side of the pressing member 15 away from the reflector 14, second limiting members 153 are provided. At positions corresponding to the second limiting members 153 on the optical films 16, second positioning portions 161 for cooperating with the second limiting members 153 to fix the optical films are provided. In one embodiment, the second limiting members 153 may be, for example, bumps, and the second positioning portions 161 may be, for example, through holes. The plurality of optical films 16 cover the reflector 14, and the bumps penetrate through the through holes to fix the optical films 16.

[0056] In another embodiment, as shown in the structure of the support member 12 Figure 4a As shown, at this time, the light bar 11 is engaged inside the first card interface 20, and it cannot fall off from the first card interface 20 and will not squeeze the reflector 14. Therefore, the pressing member 15 does not need to be provided. Of course, in order to avoid rigid contact between the light bar 11 and the support member 12, a buffer pad may be provided in the first card interface 20. Further, in this embodiment, since the pressing member 15 does not need to be provided, in order to fix the optical films 16, third limiting members (not shown in the figure, the third limiting members may be, for example, bumps) may be provided on the first side surfaces of the first support member 121 and the second support member 122. At positions corresponding to the third limiting members on the optical films 16, third positioning portions (the third positioning portions may be, for example, through holes) for cooperating with the third limiting members to fix the optical module are provided. The plurality of optical films 16 cover the reflector 14, and the bumps penetrate through the through holes, thereby fixing the optical films 16.

[0057] The backlight device 10 of the present application further includes an outer frame 17. The outer frame 17 includes a top wall 174 and an annular side wall 176 connected to the top wall 174. A hollow portion 175 is provided on the top wall 174. The annular side wall 176 is disposed around the outer periphery of the frame body (formed by the support member 12 and the side structure member 13). At a position of the annular side wall 176 corresponding to the support member 12, a fourth card interface 173 is provided, and at a position corresponding to the side structure member 13, a fifth card interface 172 is provided. At a position of the outer wall of the support member 12 corresponding to the fourth card interface 173, a second card connection portion 23 is provided. At a position of the outer wall of the side structure member 13 corresponding to the fifth card interface 172, a third card connection portion 134 is provided. The outer frame 17 is covered on the light bar 11, and the second card connection portion 23 is engaged into the fourth card interface 173, and the third card connection portion 134 is engaged into the fifth card interface 172. Among them, at a position of the annular side wall 176 of the outer frame 17 corresponding to the first card interface 20, an avoidance groove 171 for leading out the signal line 30 is further provided.

[0058] It can be understood that in order to snap-fit the outer frame 17, the fourth snap interface 173 and the fifth snap interface 172 are through holes. Further, the outer frame 17 is made of an elastic material.

[0059] In the backlight device 10 of the present application, the support member 12 is straight (as Figure 3 or Figure 4a and Figure 4b shown) or curved (as Figure 9 shown, Figure 9 is a schematic structural view of the third embodiment of the support member of the present application). When manufacturing the curved backlight device 10, only the straight support member 12 needs to be made into a curved support member 12, and other components do not need to be replaced. As long as the installation space formed by the curved support member 12 is sufficient, the remaining components can be directly installed on the curved support member 12, and the assembly is simple, which can improve the versatility of the components.

[0060] See Figure 10a - Figure 10e , in one embodiment, the side structure member 13 can be first assembled with the support member 12, and then the light bar 11 can be assembled on the support member 12. In another embodiment, the light bar 11 can also be first assembled on the support member 12, and then the side structure member 13 can be installed. In the present application Figure 10a first assembles the side structure member 13 with the support member 12. Specifically, the first clamping portions 131 located at both ends of the side structure member body 133 in the side structure member 13 are snapped into the second snap interfaces 24 at the ends of the support member 12. The first through holes 132 on the first clamping portions 131 are aligned with the second through holes 25 in the second snap interfaces 24, and the first fixing member 18 passes through the first through holes 132 and the second through holes 25 to fix the side structure member 13 and the support member 12.

[0061] Further, as Figure 10b shown, the light bar 11 is sequentially loaded into the first snap interface 20 on the support member 12, and the signal line 30 is sequentially inserted.

[0062] As Figure 10c shown, the reflector 14 is placed above the light bar 11. Specifically, to improve the assembly effect, a heat dissipation tape can be pre-coated on the bottom surface of the reflector 14 (i.e., the side close to the light bar) or the surface of the light bar 11 (the side close to the reflector 14) to form a heat dissipation layer. It can ensure that the reflector 14 fits on the surface of the light bar 11, prevent the reflector 14 from warping / falling off, and can also improve the heat dissipation efficiency, thereby enhancing the reliability of the backlight device. When the reflector 14 is disposed on the surface of the light bar 11, the first limiting member 22 on the support member 12 cooperates with the first positioning portion 142 on the reflector to fix the reflector 14.

[0063] As Figure 10dAs shown, the pressing member 15 is further assembled. The first clamping portion 131 of the side structural member 13 is clamped with the third clamping opening 151 of the pressing member 15. Moreover, the first groove 21 of the pressing member 15 corresponds to the first clamping opening 20 of the support member 12, and the buffer pad in the first groove 21 presses the light bar 11 in the first clamping opening 20. Further, the third through hole 154 on the pressing member 15 is aligned with the fourth through hole 26 of the support member 12, and the second fixing member 19 passes through the third through hole 154 and the fourth through hole 26 to fix the pressing member 15 on the support member 12.

[0064] As Figure 10e shown, the optical film 16 is assembled. The second positioning portion 161 on the optical film 16 cooperates with the second limiting member 153 on the pressing member 15 to fix the optical film 16. Finally, the outer frame 17 is covered to ensure that the second clamping portion 23 on the outside of the support member 12 and the third clamping portion 134 on the outside of the side structural member 13 are snapped into the fourth clamping opening 173 and the fifth clamping opening 172 of the outer frame 17.

[0065] The beneficial effects of the present application are as follows: The single glass-based light bar is assembled and then fixed by the pressing member to form a light board assembly, which is combined with a reflector, an optical film, a rubber frame, etc. to form a backlight device. The advantages are as follows: Each single light bar can be independently manufactured. If there is a problem with a single light bar (bad light / insufficient brightness), it can be replaced at any time. Only single light bars need to be manufactured, and compared with the overall direct-lit glass substrate, the manufacturing process is greatly simplified, which helps to improve the manufacturing yield of the glass-based light bar, thereby reducing costs. In addition, if the size of the light bar changes, only the support member needs to be changed, and other components do not need to be replaced, improving the versatility of the components. In addition, it is suitable for both flat and curved display modules, does not require the replacement of the support member, has high component versatility, is suitable for automated assembly, and can improve the assembly efficiency.

[0066] See Figure 11 , Figure 11 is a schematic structural diagram of an embodiment of the display device of the present application. The display device 100 includes a backlight device 10 and a display panel 200. The display panel 200 is disposed on the light-emitting side of the backlight device 10. The backlight device 10 is the backlight device 10 shown in any of the above embodiments, which will not be elaborated here.

[0067] The above are only the embodiments of the present invention, and do not limit the patent protection scope of the present invention. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. A backlight device, characterized in that: include: A support assembly, comprising two side structural members extending along a first direction and arranged oppositely, and two support members extending along a second direction and arranged oppositely; two ends of the support member are detachably connected to two ends of the side structural member to form a frame; the support member is respectively provided with a plurality of first card interfaces along the second direction, and the first card interfaces on the two oppositely arranged support members correspond in position in the first direction; the first direction intersects with the second direction; A plurality of light strips; ends of the light strips are respectively snapped into the first snap interfaces of the two oppositely arranged support members.

2. The backlight device according to claim 1, characterized in that: The side structure comprises a side structure body along the first direction and first clamping parts arranged at two ends of the side structure body, and the first clamping part is provided with a first through hole penetrating the first clamping part; The support member is provided with a second card interface along the second direction and at a position corresponding to the first card connection portion, a second through hole is provided at a position of the second card interface corresponding to the first through hole, the first card connection portion is clamped into the second card interface, and the first through hole is communicated with the second through hole; The backlight device further includes a first fixing member, which passes through the first through hole and the second through hole to fix the side structure member and the support member.

3. The backlight device according to claim 2, characterized in that: The backlight device further comprises: A reflective sheet; a first stopper is provided on the first side surface of the support member, a first positioning portion is provided at a position of the reflective sheet corresponding to the first stopper, and the first positioning portion cooperates with the first stopper and is used to fix the reflective sheet; The reflective sheet is further provided with a plurality of windows, the windows corresponding to the lamp beads on the light bar one by one, and the lamp beads are exposed from the windows.

4. The backlight device according to claim 3, characterized in that: The backlight device further comprises: A pressing member; the pressing member is located at a side of the reflector away from the support member and is arranged corresponding to the support member; a third card interface is arranged at both ends of a side of the pressing member close to the support member at positions corresponding to the side structure member, the first card connection portion of the side structure member is engaged with the third card interface, the pressing member is further provided with a third through hole, and a fourth through hole is arranged at a position of the support member corresponding to the third through hole; a second fixing member, the second fixing member passing through the third through hole and the fourth through hole to fix the pressing member; A plurality of optical films are arranged on a side of the reflector away from the light strip, and second limiting members are arranged at both ends of the side of the clamping member away from the reflector. A second positioning portion is arranged at a position of the optical film corresponding to the second limiting member and cooperates with the second limiting member to fix the optical film.

5. The backlight device according to claim 4, characterized in that: The first card interface includes a plurality of first grooves arranged on the first sides of the two supporting members, the first grooves having a bottom wall, two opposite side walls, and a rear wall connecting the two side walls; the ends of the plurality of light strips are carded into the first grooves, the bottom wall carries the ends of the light strips, the rear wall abuts against the ends of the light strips, and the two side walls are in contact with the side surfaces of the ends of the light strips; The first limiting member on the support member is arranged at a position staggered from the first groove; the reflective sheet comprises a reflective sheet body and a lug connected to the reflective sheet body, the lug is arranged at a position corresponding to the first limiting member, and the cross section of the lug is larger than the cross section of the first limiting member, and the first positioning portion is arranged at a position of the lug corresponding to the first limiting member; the outer edge of the reflective sheet is aligned with the inner edge of the frame; A second groove is arranged on one side of the pressing member close to the supporting member at a position corresponding to the first groove, and a buffer pad is arranged in the second groove.

6. The backlight device according to claim 3, characterized in that: The support member includes a first support member and a second support member, the first card interface includes a third groove opening located at a second side of the first support member, and a fourth groove opening located at a third side of the second support member, the second side of the first support member and the third side of the second support member are opposite; The third groove includes: a sub-groove and a sub-through hole that are interconnected, the third groove runs from the second side of the first support member to the third side of the first support member, the diameter of the sub-groove is larger than the diameter of the sub-through hole, one end of the light bar is inserted into the fourth groove, and the other end is inserted into the sub-groove, and the sub-through hole is used to set a signal line connecting the light bar; The backlight device also includes: a plurality of optical films, wherein the optical films are arranged on a side of the reflective sheet away from the light bar, a third limiting member is arranged on the first side surfaces of the first supporting member and the second supporting member, and a third positioning portion is arranged at a position of the optical film corresponding to the third limiting member and cooperating with the third limiting member to fix the optical film.

7. The backlight device according to claim 2, characterized in that: The backlight device further comprises: An outer frame, the outer frame comprises a top wall and an annular side wall connected to the top wall, a hollow portion is provided on the top wall, the annular side wall is arranged around the outer periphery of the frame body, and a fourth card interface is provided at a position corresponding to the support member, and a fifth card interface is provided at a position corresponding to the side structure member; a second card connection portion is provided at a position of the outer wall of the support member corresponding to the fourth card interface, and a third card connection portion is provided at a position of the outer wall of the side structure member corresponding to the fifth card interface, the outer frame cover is arranged on the light bar, and the second card connection portion is engaged with the fourth card interface, and the third card connection portion is engaged with the fifth card interface; Wherein, a avoidance groove for leading out a signal line is further provided at a position of the annular side wall corresponding to the first card interface.

8. The backlight device according to any one of claims 1 to 7, characterized in that: The support member is in a straight strip shape or a curved shape.

9. The backlight device according to claim 3, characterized in that: The backlight device further comprises: The heat dissipation layer is arranged on a side of the reflector sheet close to the light bar, or on a side of the light bar close to the reflector sheet.

10. A display device, characterized in that: The display device comprises a backlight device and a display panel. The display panel is arranged on the light emitting side of the backlight device. The backlight device is the backlight device according to any one of claims 1 to 9.

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